Thomas holt



@gleitet tstes stnt @ffice THOMAS HOLT, CF TRIESTE, AUSTRIA.

Letters Patent No. (33,518, dated April 2, 1867'.

IMPROVEMENT IN ,STEAM GENERA'IQRS.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, THOMAS IIOLT, of Trieste, in the Empire of Austria, but new of 66 Chancery Lane, in the county of Middlesex, have invented Improvements in the Construction of Stettin Boilers;H und I'do hereby declare that the following is n full and exectdescription of my said invention.

My invention consists in constructing stea-m boilers or steam generators, both marine und land boilers, in such n nin-nner that while the evaporative power of the boiler is not diminished the dimensions of thc boiler may' be materially lessened, whereby fuel is greatly economized. I

The mode of applying the invention und adapting` it to use in the various kinds of boilers, is as follows: Instead of conducting` the heated products of combustion directly into ilues and snioltestncli, as is usual, a series of narrower shallow dishwhu-ped or oblute spheroidul chambers are arranged inside the shell of the boiler, which chambers form the interior portion and steam-generating surface of the boiler. The construction and adaptation of these chambers tothe various kinds of boilers is the chief feature of my invention.

Figure I represents e vertical section of on upright boiler with the chambers in place. I

Figure 2 is n plan or horizontal section of the some through the line x x.

Figure '3 represents o view (partly in section) of the chambers or sections.

Figure 4 is a. view of the section as it is constructed and used for horizontal boilers.

Similar letters indicate corresponding parts.

In the drawing, fig. I, A represents the shell of the boiler; B is a. central wzl-ter and steam tube; C represents the chambers or sections placed one above the other, as before mentioned; D represents ribs (either solid or hollow) upon the central tube B, which ere for the purpose of deflecting the heated gases and produetsl of combustion from n vertical to u. lateral direction, so that the heated gases may enterthe'chnmbers; E represents the water and steam space of the boiler; Frepresents-the space occupied by the smoke und heated products of combustion; -G is the furnace or fire-box; II is the pipe through which the boiler is supplied with water; .I the pipes which connect the central water tube with the annuler water space. The hot-air chamber or sections C are constructed as represented in iig. 3, lwhere the parts of the. sectionare shown sepa-rote, as a d, und where two sections are joined together, as :it b 6. To forni one section, dand al ere slipped together and riveted or bolted at c as the two sections areV at Z1. They set one upon another, surrounding thccentral tube I3, as represented in iig. I. It will be seen that this arrangement greatly increases the steam-generating surf-.ice of the boiler.

My object is not-so much to show und describe the particular details in the construction of the boiler as to demonstrate the applicability of my liet-air chambers or sections to this as well as to other kinds of boilers. In the example of my invention here shown I adept them to the vertical boiler. In constructing horizontal boilers the sections orc formed in the same manner and united in the sume inn-nner, except that the liuc is plnced eccentrically through the section, :is seen in iig. 4.? The object of this will at once be understood, as it is important that the steam-generating surf-:ice should be es much above the tire es possible. d is beneath the fire und the interior portion of the section which forms the flue, so that in ,adapting my chambers or sections to horizontal boilers the interior waiter tube is dispensed with. Two, or even more, series of my hot-air chninbers maybe combined in such a. vmanner that they may lap by or interlock each other when it is desired to increase the hentinfo` surfnces of boilers. A suitable supply of air Vmay be introduced into these hot-air chambers by curved air tubes communicating with aV supply tube upon the outside of the boilerty A much more perfect combustion of the heated gases may thus be obtained. In 'passing through the hot-airchambers theV products of combustion are so detained er retarded in their course that the surrounding water absorbs the caloric which they contain to a goed degree, thus greatly econoinizing fuel.

I do not confine myself to the particular manner herein described of forming my hot-air chambers or sections, although I prefer the dish-shuped or convex form.

Having thus described my invention, what I claim es new, and desire to secure by LettersPaten t, is-

The hot-air chambers or sections C, enclosing the steam and water tube B, and enclosed within the boiler A, constructed and arranged es herein set forth for the purpose specified.'

THOMAS HOLT, [1.. s]

In Trieste, Contrada O'zz'adz'no 130.

Witnesses EDWARD MANDOLIN, in Trieste, Contrada Ohz'adt'no 204.

Anus OnzAUP,z'n Trieste, Exchange, No. 55T. 

